Word: poling
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Dates: during 1940-1949
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...Canada's barren backlots is a small area where the compass needle, properly suspended, points directly downward. This phenomenon does not usually terrify observers: they know that they are standing on the north magnetic pole, the umbilicus of the earth's magnetic field. When the magnetic pole changes its location, as it does, the needles of all the world's compasses shift a little...
Almost the only constant thing about the magnetic pole is the fact that it is forever on the move. Every day it wobbles slightly, and over the years its "mean position" drifts slowly...
...first reliable fix on the pole's position was made in 1829-32 by Sir James
...Sage's phone began to Pierce the quiet. "I'm calling from a Booth in Boston," his apprentice announced. "Where shall I leave the car?" Parker by the common, or Draper around a pole. It'll be Shafer." Harvard 28 Coast Guard...
Carrying 38½ tons of gasoline, the Dreamboat had no room for de-icing equipment, ran into a nightmare of icing conditions over the Arctic. But it made, the 9,500-mile run in 39½ hours. Its crew had gathered evidence that the North Magnetic Pole was 200 miles north of the position shown on the charts. They had also proved that transpolar air war was possible: the Army's new B-36 bomber-or any comparable foreign plane-could make a similar flight carrying an atomic bomb...